1  # -*- bash -*-
 2  #
 3  # utilities for maint/ scripts.
 4  
 5  # Shellcheck is confused.
 6  # It thinks it ought to be checking this as a standalone script, and prints
 7  #   -- SC2148 (error): Tips depend on target shell and yours is unknown.
 8  #             Add a shebang or a 'shell' directive.
 9  # shellcheck shell=bash
10  
11  unalias -a
12  shopt -s expand_aliases
13  
14  fail () {
15      echo >&2 "error: $*"
16      exit 12
17  }
18  
19  x () {
20      echo >&2 "x $*"
21      "$@"
22  }
23  
24  alias reject_all_arguments='
25      if [ $# != 0 ]; then
26  	fail "bad usage: no arguments allowed"
27      fi
28  '
29  
30  # shellcheck disable=SC2142
31  alias reject_options='
32  case "${1-}" in
33      --) shift ;;
34      -*) echo >&2 "$0: No options allowed"; exit 12 ;;
35  esac
36  '
37  
38  # Prints a list of the files in git, with a #! that looks like (ba)sh
39  git_grep_for_shell_script_shebangs () {
40      git grep -P --line-number '^#! ?(/usr/bin/env |/bin/)(:?ba)?sh\b' \
41  	| sed -n 's/:1:[^:]*$//p'
42  }